Some clever hackers edited our .htaccess files so that anytime someone visited via Google or another search engine got redirected to a virus download, then back to google. If you arrived here via a Google Search since the time this post was made, please run a virus scan with your anti-virus/malware scanner ASAP. We've corrected the problem and hopefully we don't get hijacked again.
Update: Finally got rid of the virus issue I think. Not sure what plugin was exploiting the website, but I got it fixed. Please PM me if you find otherwise.